You don't increase the frame size,  you just pack more encoded frames in
rtp.
Dragos
On Dec 13, 2011 8:47 AM, "Mike Dawson" <[email protected]> wrote:

> Dear All,
>
> I have a situation that I think might be common: I want to run SIP
> sessions over a VPN.  I am using mostly the speex codec.  The VPN is
> running over UDP and the issue is that with a small packet being sent
> more frequently the packet overhead is increasing bandwidth usage 2-3x.
>
> So what would be helpful would be to pass a parameter to the codec to
> try and increase the frame size so that fewer larger packets go out (and
> reduce the overhead loss).
>
> I noticed:
>
> http://lists.gnu.org/archive/html/linphone-developers/2010-04/msg00078.html
>
> But not sure if that applies to audio only - looks like according to
> speex doc this should be possible:
>
> http://www.speex.org/docs/manual/speex-manual/node13.html
>
> Does anyone have any hints on where to look for module parameters or
> what to do if they don't yet exist - I guess I would have to modify some
> source.
>
> Many Thanks,
>
> -Mike
>
> 14:24:08.996504 IP user2-Aspire-S3.local.36666 >
> static.1.2.3.4.clients.your-server.de.openvpn: UDP, length 141
> 14:24:08.996647 IP6 fe80::76de:2bff:fe3d:7b08.mdns > ff02::fb.mdns: 0
> PTR (QM)? 254.255.128.10.in-addr.arpa. (45)
> 14:24:08.996792 IP user2-Aspire-S3.local.36666 >
> static.1.2.3.4.clients.your-server.de.openvpn: UDP, length 125
> 14:24:08.996825 IP user2-Aspire-S3.local.mdns > 224.0.0.251.mdns: 0 PTR
> (QM)? 254.255.128.10.in-addr.arpa. (45)
> ^C14:24:09.096979 IP ASUS.local.63816 > 239.255.255.250.1900: UDP,
> length 133
>
>
> 14:24:56.316471 IP user1-Satellite-A300.local.7078 >
> user2-Aspire-S3.local.7078: UDP, length 18
> 14:24:56.341113 IP user2-Aspire-S3.local.7078 >
> user1-Satellite-A300.local.7078: UDP, length 58
> 14:24:56.345263 IP user1-Satellite-A300.local.7078 >
> user2-Aspire-S3.local.7078: UDP, length 18
> 14:24:56.355261 IP user1-Satellite-A300.local.7078 >
> user2-Aspire-S3.local.7078: UDP, length 18
> 14:24:56.362484 IP user2-Aspire-S3.local.7078 >
> user1-Satellite-A300.local.7078: UDP, length 58
>
>
>
>
> _______________________________________________
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>
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